These wheels are 17" OEM wheels that come with the 1999 Porsche Boxster as part of the Sport Touring package. They should fit 1997-2004 Boxster and 1999-2001 911 and many other Porsche models (see the measurements below).
There rims are in nice shape with no road rash -- with one small exception - one wheel has a small nick in it. You will need to provide your own center caps.
Some example uses:
*With snow tires (if you want to drive during the colder months).
*As spare rims for getting new tires (for example if you take the car to the track and want track tires on separate rims so you can easily swap in/out.)
*As extra rims to make it more convenient to get new tires so you dont have to bring the whole car to the shop.
Measurements (from my original manual):
Front: 205/50 Rim: 7J x 17 H2, Rim offset: 55mm
Rear: 255/40 Rim: 8.5J x 17 H2, Rim offset: 50mm
Both are 5 lug, 130mm bolt pattern
I've added several pictures and if you need more, just ask. They are a nice upgrade from the 16" base wheel look.